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A Homemade Pump. Yes a Pump, not a cylinder.

I looked at home depot for the needle valves too, but they didnt have them here. Back when I lived in Vegas they did, but here they don’t carry them.


My total cost for the pump was about $350 to $370. If you can get the pump motor for that price like he did you can chop a hundred or more off that price. I’ve been resting for like a month now, so I wanted to get going again. The good news is the cylinders… it was $27 for all the stuff to make all the cylinders I will probably ever need. So compared to paying $50 or $100 each for cylinders, I saved a horrendous amount. It all evens out, I guess.

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All truth goes through three stages: First it is ridiculed. Then it is violently opposed. Finally it is accepted as self evident. -Schopenhauer

I am against religion because it teaches us to be satisfied with not understanding the world. -Richard Dawkins

Electron, thanks for the excellent account of how you made the cylinder. I’ve seen hole saws that big, I think. I have a good plastics store two blocks from work, so I can go up there and browse. I know they sell the bulk six foot tubing, and I think I saw a bin full of various sized scrap peices that I could use for the top piece. I don’t have a treading kit, so that’s one thing that may require some investment. Maybe I can just buy a la carte at Home Depot. I wonder…what size is the thread hole required to accomodate the girl end of the tube coupler?

The thread I have was determined by the plumbing fittings (brass pipe and hose barbs) that it had. I had to go just get the fittings first, then see what the thread was and match it to that. This one turns out to be a seldom used pipe thread, and when I looked at home depot they don’t have that size, but fortunately I already had one. I suppose if I had to go find one, there’s a good chance it might be at a plumbing wholesaler.

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All truth goes through three stages: First it is ridiculed. Then it is violently opposed. Finally it is accepted as self evident. -Schopenhauer

I am against religion because it teaches us to be satisfied with not understanding the world. -Richard Dawkins

Yeah, see I don’t know in that picture what size it is they use. No way to tell. I have no familiarity with other pumps, never used one before, so I don’t have any idea what the “standard” size is for pumping connectors, or pumping tubing, or whatever. Maybe different pump companies use different sizes, none of them say and I just don’t know anything about that. I just took the size it had coming out of the threads of the pump, and made it the same size all the way through. When it got to the end and getting the hose barbs, the hose barbs that “fit” these threads “want” to have 1/4 inch tubing (Inside diameter) going onto them, so I bought tubing that is roughly 1/4 inch inside diameter, and 3/8 inch outside diameter. The threads on mine are 1/4-18 NPT (national pipe thread).

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All truth goes through three stages: First it is ridiculed. Then it is violently opposed. Finally it is accepted as self evident. -Schopenhauer

I am against religion because it teaches us to be satisfied with not understanding the world. -Richard Dawkins

Hats off to Electron for coming up with this pump set up idea…and to xaxxat for his input.

I finally got all the stuff & wired my pump like electron did & absolutely love it. It does just like he described with the “suck & release.” You can set it to have it pull vacuum for however many seconds or minutes & then release for however many seconds or minutes you want. I love the “hands free” operation & it definitely has some good pull/stretch to it with the alternating pressures. I have mine set up to pull/stretch for about 22 seconds and then release for about 3 seconds @ 4-5hg and run the cycle for 2 - 10 minute sessions so far. The cost of mine was about $178 because I got a lot of the stuff off ebay (pump/timer, etc.) & my cylinder is the aquarium gravel cleaner & I flared the end with heat.


Baz9, that’s great! Glad to see you got it working. I may get one of those timers so I can experiment with it too. Those longer cycles sound interesting. You got yours on Ebay? How much was it?

As for a reminder for those who want to build a similar device, one of the best ways to keep the cost way down is get a vacuum pump from an old refrigerator or air conditioner. I’ve gotten them for free and they work beautifully. They’re powerful and quiet.

X…you should give it a try. I just happened to come upon the same Omron timer on e-bay with the repeat cycle. There are a lot that don’t have the repeat cycle, but I don’t think that would work. I paid about $36.00 with shipping & it was new which is a great price over retail. I agree with you about the refrigerator motor. I had one that would have worked great, but it was very old & had big open holes for the air intake vs any fitting so I decided to go with the Gast pump.


Electron, you do good professional looking work! Keep it up!

XAXXAT- The refrigerator “pumps” do a respectable job bit they have a few drawbacks. They can run quite hot when not pumping cool refrigerant gas, the cool refrigerant helps to cool the motor. Worse, they are oil lubricated, if they are “older” and had been designed and used with R-12 or R-22( now “banned” and taxed out of common use ) the oil is just a good mineral oil sort of like thin motor oil but the pump will blow more or less oil and oil mist out the exhaust air, messy, smelly and a possible health hazard, and the health & safety inspectors at work made us put oil mist trap/mufflers on all of our oil lubricated vacuum pumps, very expensive! The newer refrig. pumps, designed for R-134 “NEW FREON” use exotic synthetic non-oil lubricants, which form strange and innappropriate sludges when exposed to moisture, which will be significant in our application, supposedly not too good for the pump internal works. I haven’t looked into their health problems. The Gast and other similar oil-less pumps would be much better, even though they are somewhat noisier, than the sealed, oil-lubricated types. I found an unusual vacuum pump which is completely silent and it also “cycles” the pressure. It was designed for hospital suction use and it works by warming the air in a “semi-closed” chamber so the pressure rises and then flows out through a one-way “exhaust” valve, a timing circuit then turns the heater off and as the remaining air in the chamber contracts sucking in more air through the “inlet” one-way valve. The cycle keeps repeating silently and the maximum vacuum is limited by the expansion-contraction of the air based on the time and heat. It only generates about 120 mmHG = ~4.7 in. Hg, for the less science minded, which is a very nice, safe vacuum. I will try to post the information and some pictures soon, but I’m taking a week’s vacation very soon and it may be a week or so. I haven’t had time to plot the vacuum vs. time but plan to as well as look into adjusting the cycling to give different vacuum cycling profiles. One of my long term goals, with this pump is to achieve a very low amount of vacuum, cycling up and down and try it for extended times, like overnight. Yeah, Yeah I know, the advice is not to do any PE while sleeping, but at the very modest vacuum, perhaps only ~1 or 2 in. Hg, with a cylinder and seal which don’t pinch or reduce circulation may well be safer than commonly thought. Don’t try this at home! I can’t tell anyone to try this, but my few trial runs have gone very well, with no apparent ill effects but a very nice plump circumference with little to no donut. I still have the opinion that long periods of light to moderate PE may in some cases be as good or better than the heavy forces most of apply for much shorter times. We probably will still argue or differ on the light or heavy, long or short times, but I think each have some merit, and we are still “inventing” this as we go along.

sailboatracer, thanks for the heads-up. I wasn’t aware of any unhealthy vapors being emitted. Looks like I’ll have to break out my diaphragm pump and hook it back up. Thanks again!

I’ve just started experimenting with pumping. Love this web site for ideas. I didn’t want to wait to order a fancy pump by mail so I ran down to an auto parts store and bought a hand vacuum pump and gauge used with carburetors and a tube of caulking from the hardware store. I cut off the end of the caulking tube as so the tubing that came with the vacuum pump would slide inside. I pulled out the bottom for the caulking tube and emptied and cleaned. The standard caulking tube is 6 inches around and 8.5 inches long. I slid it over my penis and started pumping. Wow what a rush. It took about 30 minutes to build and 50.00 to buy everything.

Howdy all - I’m new here. One contribution I can make is for the cylinder. The acrylic tubing is cheap and if you don’t glue a cap on you can always use a rubber PVC cap from the plumbing section of Home Depot or Lowes. The caps come in different diameters and will slip over 2 - 2.5” acrylic tubing. You’ll still need the get the npt to 1/8 fitting but drill a smaller hole or the vacuum will suck it through. I was able to secure the npt to 1/8 fitting to the rubber end cap with washers and a skinny nut - works great and comes apart easily for cleaning.

The end of the acrylic tube can be flared for a more comfortable fit. You need to carefully heat the tube end with a heat gun. When you heat it up, be careful cause you’ll bubble the tube if you get it too hot. It will still seal - just looks like crud if you don’t back off. Once you get it soft, you can start the flare against a funnel - once you get it going use a work bench and put downward pressure on the tube. This worked best for me when I used an insert to prevent tube collapse then ran the edge along the work bench - rotating until I had the right amount of flare. I think this makes it very comfortable.

This is an awesome thread!

I have a question regarding the Pulsator.

Here’s a link that was provided earlier:


If I we’re to purchase this - does this create the vacuum and pulsate it? What I’m meaning here is what else do I need to buy? I read that it’s good for a range of pulsations which is cool and up to 15psi; obviously, I’d need to vent vacuum over 8 or whatever PSI into the atmosphere. Besides that, what else would I need to buy and how noisy is this thing?

Thanks in advance!

Thanks Boogie Man69 That edge does get rougher as the workout goes on. I will try that asap.

Glad to help Addicted. Yell if you get stuck - just be careful you don’t focus in one area too long or you will bubble the acrylic. I used a small rolling pin or the big end of the olympic barbell from my weight set to keep the ID from compressing. Once you get the acrylic soft, you can manipulate it how you need it - it’s a much more comfortable fit. Just take it slow to heat it up.

Anyone have a reply on the pulsator question I had ?


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